Photon-assisted tunneling in hBN encapsulated graphene quantum dot under coherent THz illumination
Simon Messelot  1, *@  , Elisa Riccardi  1@  , Sylvain Massabeau  1@  , Michael Rosticher  1@  , Kenji Watanabe  2@  , Takashi Tanigushi  2@  , Jérôme Tignon  1@  , Sukhdeep Dhillon  1@  , Sebastien Balibar  1@  , Takis Kontos  1@  , Juliette Mangeney  1, *@  
1 : Laboratoire de physique de lÉNS - ENS Paris
École normale supérieure - Paris, Université Paris sciences et lettres, Sorbonne Université, Centre National de la Recherche Scientifique : UMR8023, Université de Paris
24, rue Lhomond75005 Paris -  France
2 : NIMS
* : Corresponding author

Using transport spectroscopy under coherent THz illumination, we demonstrate THz light-matter coupling in a graphene quantum dot from 100 GHz to 380 GHz. The quantum absorption of THz photons results in photo-induced satellite current peaks as a signature for photon-assisted tunneling. Our study shows the coherent interaction between the GQD and THz radiation.


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